In his classic 1984 book, Bodybuilding: A Scientific Approach, Fred Hatfield presented a model of training aimed at exploiting the adaptations provided by each of the three dominant rep ranges used in the strength training of that era (4-6, 10-12 and 20-25 reps).

I've been called a wide variety of names over the past couple of years. These names have ranged from "guru" to "cheater." Frankly, I don't give a damn what people call me. The bottom line is that I get results with my athletes.